/* ==========================================================================
   Ligandly : plain, README-style stylesheet (cell.guide inspired)
   ========================================================================== */

:root {
  --text: #1a1a1a;
  --text-muted: #57606a;
  --link: #0969da;
  --border: #e1e4e8;
  --bg-subtle: #f6f8fa;
  --max-width: 780px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #ffffff;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header ---------- */

.site-header .wrap {
  display: flex;
  align-items: baseline;
  gap: 24px;
  padding: 40px 24px 0;
}

.brand {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
}

.site-nav {
  display: flex;
  gap: 18px;
  font-size: 15px;
}

.site-nav a {
  color: var(--text);
}

/* ---------- intro ---------- */

.intro {
  padding: 20px 0 32px;
}

.intro p {
  font-size: 17px;
  color: var(--text);
  margin: 0 0 28px;
  max-width: 60ch;
}

.btn {
  display: inline-block;
  background: var(--link);
  color: #ffffff;
  font-size: 15px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 6px;
}

.btn:hover {
  background: #0757ba;
  text-decoration: none;
}

/* ---------- principle callout ---------- */

.principle {
  padding: 8px 0 36px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin: 8px 0 36px;
}

.principle p {
  margin: 20px 0 0;
  color: var(--text);
  max-width: 62ch;
}

.principle p.attribution {
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 12px;
}

/* ---------- sections / headings ---------- */

h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 16px;
}

section {
  padding-bottom: 40px;
}

/* ---------- feature list ---------- */

ul.plain {
  padding-left: 20px;
  margin: 0;
}

ul.plain li {
  margin-bottom: 6px;
}

/* ---------- tools list ---------- */

.tool-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.tool-item:first-child {
  border-top: 1px solid var(--border);
}

.tool-item h3 {
  font-size: 17px;
  margin: 0 0 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tag {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
}

.tool-item p {
  margin: 0 0 6px;
  color: var(--text-muted);
  font-size: 15px;
}

/* ---------- about ---------- */

.about p {
  color: var(--text-muted);
  max-width: 62ch;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 48px;
  font-size: 14px;
  color: var(--text-muted);
}

/* ---------- responsive ---------- */

@media (max-width: 560px) {
  .site-header .wrap {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }
}